Image Presentation Method and Apparatus, and Terminal

ABSTRACT

A preview image presentation method and apparatus, and a terminal are provided. The method includes acquiring, by a terminal, an image captured by a camera; and presenting, on a screen of the terminal, a first preview image and a second preview image that are generated according to the image, where a size of the second preview image is less than a size of the first preview image. In the embodiments of the present invention, on an existing basis of displaying a first preview image in a full screen manner, a second preview image that is smaller than the first preview image may be presented additionally, so that a user can adjust photographic composition according to the second preview image, thereby enhancing a photography effect and improving user photography experience.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2014/071131, filed on Jan. 22, 2014, which claims priority toChinese Patent Application No. 201310023362.8, filed on Jan. 22, 2013,both of which are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

The present invention relates to the field of intelligent terminaltechnologies, and in particular, to a preview image presentation methodand apparatus, and a terminal.

BACKGROUND

In the prior art, intelligent terminals have been applied widely.Generally, one front-facing camera and one rear-facing camera may bedisposed on an intelligent terminal. In a common state, the front-facingcamera faces a user holding the intelligent terminal, and may implementimage presentation when the user is making a video call or taking aselfie. That the user takes a selfie is used as an example. Theintelligent terminal may display a preview image in real time on ascreen according to an output of the front-facing camera. The user mayadjust, according to the preview image, image composition, on thescreen, of an image that is captured by the front-facing camera, andwhen obtaining satisfactory image composition by means of adjustment,the user taps a camera button to complete the selfie.

In a process of researching the prior art, the inventor finds that anintelligent terminal generally displays a preview image in a full screenmanner; when observing the preview image, a user generally watches thecenter of the image; and in this case, eyes of the user in the previewimage are difficult to focus because a sight line of the user divergesfrom a front-facing camera. In addition, if watching the front-facingcamera, the user can observe the preview image only by using aperipheral vision, and it is difficult to capture an expression change.It may be learned from this that when an intelligent terminal performspreview displaying on an image captured by a front-facing camera, aphotography effect is poor because the displaying can be performed onlyin a full screen manner, thereby causing poor user photographyexperience.

SUMMARY

Embodiments of the present invention provide a preview imagepresentation method and apparatus, and a terminal, so as to resolve aproblem in the prior art of a poor photography effect and poor userphotography experience that are caused by displaying a preview image ina full screen manner.

To resolve the foregoing technical problem, the embodiments of thepresent invention disclose the following technical solutions.

According to a first aspect, a preview image presentation method isprovided, where the method includes acquiring, by a terminal, an imagecaptured by a camera; and presenting, on a screen of the terminal, afirst preview image and a second preview image that are generatedaccording to the image, where a size of the second preview image is lessthan a size of the first preview image.

With reference to the first aspect, in a first possible implementationmanner of the first aspect, the presenting, on a screen of the terminal,a first preview image and a second preview image that are generatedaccording to the image includes presenting, in a display area of thescreen, the first preview image generated according to the image;generating the second preview image according to the first preview imageby using a downscale algorithm; and presenting the second preview imageon a preset location in the display area.

With reference to the first possible implementation manner of the firstaspect, in a second possible implementation manner of the first aspect,the presenting the second preview image on a preset location in thedisplay area includes presenting the second preview image bysuperimposing the second preview image on a preset location of the firstpreview image; or presenting the second preview image on a presetlocation that is independent of the first preview image.

With reference to the first possible implementation manner of the firstaspect, or the second possible implementation manner of the firstaspect, in a third possible implementation manner of the first aspect,the preset location includes a location that is located in a samevertical direction as the camera and is spaced from the camera by adistance less than a threshold; or a location that is in a directionhaving a preset included angle with respect to a vertical direction ofthe camera and is spaced from the camera by a distance less than athreshold.

With reference to the first aspect, the first possible implementationmanner of the first aspect, the second possible implementation manner ofthe first aspect, or the third possible implementation manner of thefirst aspect, in a fourth possible implementation manner of the firstaspect, the method further includes receiving an operating instructionof a user on the second preview image; and presenting the second previewimage on a target location indicated by the operating instruction.

According to a second aspect, a preview image presentation apparatus isprovided, where the apparatus includes an acquiring unit configured toacquire an image captured by a camera; and a presentation unitconfigured to present, on a screen of a terminal, a first preview imageand a second preview image that are generated according to the imageacquired by the acquiring unit, where a size of the second preview imageis less than a size of the first preview image.

With reference to the second aspect, in a first possible implementationmanner of the second aspect, the presentation unit includes a firstpresentation subunit configured to present, in a display area of thescreen, the first preview image generated according to the image; and asecond presentation subunit configured to generate the second previewimage according to the first preview image by using a downscalealgorithm, and present the second preview image on a preset location inthe display area.

With reference to the first possible implementation manner of the secondaspect, in a second possible implementation manner of the second aspect,the second presentation subunit is configured to present the secondpreview image by superimposing the second preview image on a presetlocation of the first preview image, or present the second preview imageon a preset location that is independent of the first preview image.

With reference to the second aspect, the first possible implementationmanner of the second aspect, or the second possible implementationmanner of the second aspect, in a third possible implementation mannerof the second aspect, the apparatus further includes a receiving unitconfigured to receive an operating instruction of a user on the secondpreview image, where the presentation unit is further configured topresent the second preview image on a target location indicated by theoperating instruction received by the receiving unit.

According to a third aspect, a terminal is provided, where the terminalincludes a processor, and a camera and a screen that are connected tothe processor, where the camera is configured to capture an image, andtransfer the image to the processor; and the processor is configured topresent, on the screen, a first preview image and a second preview imagethat are generated according to the image, where a size of the secondpreview image is less than a size of the first preview image.

With reference to the third aspect, in a first possible implementationmanner of the third aspect, the processor is configured to present, in adisplay area of the screen, the first preview image generated accordingto the image, generate the second preview image according to the firstpreview image by using a downscale algorithm, and present the secondpreview image on a preset location in the display area.

With reference to the first possible implementation manner of the thirdaspect, in a second possible implementation manner of the third aspect,the processor is configured to present the second preview image bysuperimposing the second preview image on a preset location of the firstpreview image, or present the second preview image on a preset locationthat is independent of the first preview image.

With reference to the third aspect, the first possible implementationmanner of the third aspect, or the second possible implementation mannerof the third aspect, in a third possible implementation manner of thethird aspect, the processor is further configured to receive anoperating instruction of a user on the second preview image, and presentthe second preview image on a target location indicated by the operatinginstruction.

In embodiments of the present invention, a terminal acquires an imagecaptured by a camera, and presents, on a screen of the terminal, a firstpreview image and a second preview image that are generated according tothe image, where a size of the second preview image is less than a sizeof the first preview image. In the embodiments of the present invention,on an existing basis of displaying a first preview image in a fullscreen manner, a second preview image that is smaller than the firstpreview image may be presented additionally, so that a user can adjustphotographic composition according to the second preview image, therebyenhancing a photography effect and improving user photographyexperience.

BRIEF DESCRIPTION OF THE DRAWINGS

To describe the technical solutions in the embodiments of the presentinvention more clearly, the following briefly introduces theaccompanying drawings required for describing the embodiments or theprior art. A person of ordinary skill in the art may still derive otherdrawings from these accompanying drawings without creative efforts.

FIG. 1 is a flowchart of an embodiment of a preview image presentationmethod according to the present invention;

FIG. 2 is a flowchart of another embodiment of a preview imagepresentation method according to the present invention;

FIG. 3 is a flowchart of another embodiment of a preview imagepresentation method according to the present invention;

FIG. 4A is a schematic diagram of presenting a preview image accordingto a method embodiment of the present invention;

FIG. 4B is another schematic diagram of presenting a preview imageaccording to a method embodiment of the present invention;

FIG. 4C is another schematic diagram of presenting a preview imageaccording to a method embodiment of the present invention;

FIG. 4D is another schematic diagram of presenting a preview imageaccording to a method embodiment of the present invention;

FIG. 4E is another schematic diagram of presenting a preview imageaccording to a method embodiment of the present invention;

FIG. 5 is a block diagram of an embodiment of a preview imagepresentation apparatus according to the present invention;

FIG. 6 is a block diagram of another embodiment of a preview imagepresentation apparatus according to the present invention; and

FIG. 7 is a block diagram of an embodiment of a terminal according tothe present invention.

DETAILED DESCRIPTION

The following embodiments of the present invention provide a previewimage presentation method and apparatus, and a terminal.

To enable a person skilled in the art to better understand technicalsolutions in the embodiments of the present invention and to make theforegoing objectives, features, and advantages of the embodiments of thepresent invention more obvious and comprehensible, the following furtherdescribes the technical solutions in the embodiments of the presentinvention in detail with reference to the accompanying drawings.

Referring to FIG. 1, FIG. 1 is a flowchart of an embodiment of a previewimage presentation method according to the present invention.

Step 101: A terminal acquires an image captured by a camera.

The terminal in this embodiment may be an intelligent terminal intowhich a camera and a touchscreen are integrated, for example, a smartphone, a personal digital assistant (PDA), a personal access device(PAD), and a photographic camera. The camera may refer to a front-facingcamera with a selfie function, and correspondingly, a preview imagepresented in this embodiment of the present invention may refer to animage captured by the front-facing camera.

Step 102: Present, on a screen of the terminal, a first preview imageand a second preview image that are generated according to the image,where a size of the second preview image is less than a size of thefirst preview image.

The first preview image generated according to the image captured by thecamera may be presented in a display area of the screen; the secondpreview image may be generated according to the first preview image byusing a downscale algorithm; and the second preview image may bepresented on a preset location in the display area. In this embodiment,the size of the second preview image is less than the size of the firstpreview image. Optionally, the second preview image may be presented bysuperimposing the second preview image on a preset location of the firstpreview image; or the second preview image may be presented on a presetlocation that is independent of the first preview image.

It may be learned from the foregoing embodiment that in this embodiment,on an existing basis of displaying a first preview image in a fullscreen manner, a second preview image that is smaller than the firstpreview image may be presented additionally, so that a user can adjustphotographic composition according to the second preview image, therebyenhancing a photography effect and improving user photographyexperience.

Referring to FIG. 2, FIG. 2 is a flowchart of another embodiment of apreview image presentation method according to the present invention.

Step 201: A terminal acquires an image captured by a camera.

The terminal in this embodiment may be an intelligent terminal intowhich a camera and a touchscreen are integrated, for example, a smartphone, a PDA, a palmtop computer PAD, and a photographic camera. Thecamera may refer to a front-facing camera with a selfie function, andcorrespondingly, a preview image presented in this embodiment of thepresent invention may refer to an image captured by the front-facingcamera.

Step 202: Present, in a display area of a screen, a first preview imagegenerated according to the image.

In this embodiment, a presentation manner of the first preview image isthe same as that in the prior art. Generally, the first preview imagemay be presented in the display area of the screen in a full screenmanner, which is not described herein again.

Step 203: Generate a second preview image according to the first previewimage by using a downscale algorithm.

In this embodiment, a size of the second preview image is less than asize of the first preview image. The second preview image may begenerated by using various existing downscaling algorithms, for example,with the first preview image used as an input, a second preview imagethat is one fourth the size of the first preview image is generated. Aspecific size of the second preview image is not limited in thisembodiment.

Step 204: Present the generated second preview image on a presetlocation in the display area.

In this embodiment, the second preview image may be presented bysuperimposing the second preview image on a preset location of the firstpreview image; or, the display area may be divided into two parts, wherethe larger part is used to present the first preview image and thesmaller part is used to present the second preview image, that is, thesecond preview image may be presented on a preset location that isindependent of the first preview image.

In this embodiment, the preset location may include a location near thecamera, for example, a location that is located in a same verticaldirection as the camera and is spaced from the camera by a distance lessthan a threshold; or a location having a certain angle with respect tothe camera, for example, a location that is in a direction having apreset included angle with respect to a vertical direction of the cameraand is spaced from the camera by a distance less than a threshold.

It may be learned from the foregoing embodiment that in this embodiment,on an existing basis of displaying a first preview image in a fullscreen manner, a second preview image that is smaller than the firstpreview image may be presented additionally, so that a user can adjustphotographic composition according to the second preview image, therebyenhancing a photography effect and improving user photographyexperience. For example, when the second preview image is presented neara camera, the user may enable a sight line to exactly face the camerawhen watching the second preview image, thereby improving thephotography effect.

Referring to FIG. 3, FIG. 3 is a flowchart of another embodiment of apreview image presentation method according to the present invention.

Step 301: A terminal acquires an image captured by a camera.

The terminal in this embodiment may be an intelligent terminal intowhich a camera and a touchscreen are integrated, for example, a smartphone, a PDA, a palmtop computer PAD, and a photographic camera. Thecamera may refer to a front-facing camera with a selfie function, andcorrespondingly, a preview image presented in this embodiment of thepresent invention may refer to an image captured by the front-facingcamera.

Step 302: Present, on a screen of the terminal, a first preview imageand a second preview image that are generated according to the image,where a size of the second preview image is less than a size of thefirst preview image.

The first preview image generated according to the image captured by thecamera may be presented in a display area of the screen; the secondpreview image may be generated according to the first preview image byusing a downscaling algorithm; and the second preview image may bepresented on a preset location in the display area. In this embodiment,the size of the second preview image is less than the size of the firstpreview image. Optionally, the second preview image may be presented bysuperimposing the second preview image on a preset location of the firstpreview image; or the second preview image may be presented on a presetlocation that is independent of the first preview image.

Step 303: Receive an operating instruction of a user on the secondpreview image.

A difference from the embodiment of FIG. 2 lies in that in thisembodiment, after the second preview image is presented on the screenaccording to step 302, the user may move, according to a photographyrequirement, the second preview image on the screen by using theoperating instruction. The terminal may provide preset location optionsfor the user to select, and a select action of the user for a locationgenerates a corresponding operating instruction; or, for a touchscreen,the user may drag the second preview image on the screen, and acorresponding operating instruction is generated by using a draggesture.

Step 304: Present the second preview image on a target locationindicated by the operating instruction.

According to different operating instruction types, when the operatinginstruction is an operating instruction generated according to theselect action of the user for a location, after the user ends theselection, the second preview image is presented on a selected targetlocation according to the operating instruction; when the operatinginstruction is an operating instruction generated according to the draggesture, after the user ends the dragging, the second preview image ispresented, according to the operating instruction generated by the draggesture, on a target location at which a finger leaves the screen.

It may be learned from the foregoing embodiment that in this embodiment,on an existing basis of displaying a first preview image in a fullscreen manner, a second preview image that is smaller than the firstpreview image may be presented additionally, so that a user can adjustphotographic composition according to the second preview image, therebyenhancing a photography effect and improving user photographyexperience. In addition, the user can move the second preview image, sothat flexible image composition may be performed according to aphotography requirement of the user, which further improves the userphotography experience. For example, when the second preview image ispresented near a camera, the user may enable a sight line to exactlyface the camera when watching the second preview image, therebyimproving the photography effect. For another example, when the userwants to capture a side view, the second preview image may be dragged toa location in a direction having a preset included angle with respect toa vertical direction of the camera, so as to perform the imagecomposition based on the second preview image.

The following describes a preview image presentation result of thepresent invention with reference to several presentation instances.

Referring to FIG. 4A, FIG. 4A is a schematic diagram of presenting apreview image by applying a method embodiment of the present invention.A front-facing camera is disposed on the upper right of a screen, afirst preview image is presented on a display area in a full screenmanner, a second preview image is superimposed on the first previewimage, and the second preview image is presented below the front-facingcamera. Because the second preview image is located near thefront-facing camera, when a user is watching the second preview image, apresented image is an image in which the user is watching the camera.

Referring to FIG. 4B, FIG. 4B is another schematic diagram of presentinga preview image by applying a method embodiment of the presentinvention. A front-facing camera is disposed on the upper right of ascreen, a first preview image is presented on a display area in a fullscreen manner, a second preview image is superimposed on the firstpreview image, and the second preview image has a 45-degree includedangle with respect to a vertical direction of the front-facing camera.In this case, when a user is watching the second preview image, aphotography effect of a side view of the user may be presented. Itshould be noted that FIG. 4B is not intended to limit an included anglebetween the second preview image and the vertical direction of thefront-facing camera to 45 degrees. Any angle is acceptable as long as itcan ensure that a photography effect of a side view of a user can bepreviewed when the user is watching the second preview image.

Referring to FIG. 4C, FIG. 4C is another schematic diagram of presentinga preview image by applying a method embodiment of the presentinvention. Based on FIG. 4B, the user may drag the second preview imageby using a gesture, and drag the second preview image from the locationhaving a 45-degree included angle with respect to the vertical directionof the front-facing camera to a location below the front-facing camera.Therefore, a photographing angle of the front-facing camera may beadjusted from a side view of the user to a front view of the user, and apresented image is an image in which the user is watching the camera.

Referring to FIG. 4D, FIG. 4D is another schematic diagram of presentinga preview image according to a method embodiment of the presentinvention. A difference from FIG. 4A lies in that a front-facing camerais disposed on a central location below a screen, a first preview imageis presented on a display area in a full screen manner, a second previewimage is superimposed on the first preview image, and the second previewimage is presented above the front-facing camera.

Referring to FIG. 4E, FIG. 4E is another schematic diagram of presentinga preview image by applying a method embodiment of the presentinvention. A difference from FIG. 4B lies in that a display area of ascreen is divided into two parts, where the larger first area in thelower part of the screen is used to present a first preview image in afull screen manner, a second area above the first area is used topresent a second preview image, and the second preview image may bepresented on any location in the second area. Certainly, the secondpreview image may also be presented by superimposing the second previewimage on the first preview image, which is not limited in theembodiment.

Corresponding to embodiments of a preview image presentation method ofthe present invention, the present invention further providesembodiments of a preview image presentation apparatus and a terminal.

Referring to FIG. 5, FIG. 5 is a block diagram of an embodiment of apreview image presentation apparatus according to the present invention.

The apparatus includes an acquiring unit 510 and a presentation unit520.

The acquiring unit 510 is configured to acquire an image captured by acamera.

The presentation unit 520 is configured to present, on a screen of aterminal, a first preview image and a second preview image that aregenerated according to the image acquired by the acquiring unit 510,where a size of the second preview image is less than a size of thefirst preview image.

Optionally, the presentation unit 520 may include (not shown in FIG. 5)a first presentation subunit configured to present, in a display area ofthe screen, the first preview image generated according to the image;and a second presentation subunit configured to generate the secondpreview image according to the first preview image by using a downscalealgorithm, and present the second preview image on a preset location inthe display area.

The second presentation subunit may be configured to present the secondpreview image by superimposing the second preview image on a presetlocation of the first preview image, or present the second preview imageon a preset location that is independent of the first preview image.

Referring to FIG. 6, FIG. 6 is a block diagram of another embodiment ofa preview image presentation apparatus according to the presentinvention.

The apparatus includes an acquiring unit 610, a presentation unit 620,and a receiving unit 630.

The acquiring unit 610 is configured to acquire an image captured by acamera.

The presentation unit 620 is configured to present, on a screen of aterminal, a first preview image and a second preview image that aregenerated according to the image acquired by the acquiring unit 610,where a size of the second preview image is less than a size of thefirst preview image.

The receiving unit 630 is configured to receive an operating instructionof a user on the second preview image.

The presentation unit 620 is further configured to present the secondpreview image on a target location indicated by the operatinginstruction received by the receiving unit 630.

Optionally, the presentation unit 620 may include (not shown in FIG. 6)a first presentation subunit configured to present, in a display area ofthe screen, the first preview image generated according to the image;and a second presentation subunit configured to generate the secondpreview image according to the first preview image by using a downscalealgorithm, and present the second preview image on a preset location inthe display area.

The second presentation subunit may be configured to present the secondpreview image by superimposing the second preview image on a presetlocation of the first preview image, or present the second preview imageon a preset location that is independent of the first preview image.

Referring to FIG. 7, FIG. 7 is a block diagram of an embodiment of aterminal according to the present invention.

The terminal includes a processor 710, and a camera 720 and a screen 730that are connected to the processor 710.

The camera 720 is configured to capture an image, and transfer the imageto the processor 710.

The processor 710 is configured to present, on the screen 730, a firstpreview image and a second preview image that are generated according tothe image, where a size of the second preview image is less than a sizeof the first preview image.

Optionally, the processor 710 may be configured to present, in a displayarea of the screen 730, the first preview image generated according tothe image, generate the second preview image according to the firstpreview image by using a downscale algorithm, and present the secondpreview image on a preset location in the display area.

Optionally, the processor 710 may be configured to present the secondpreview image by superimposing the second preview image on a presetlocation of the first preview image, or present the second preview imageon a preset location that is independent of the first preview image.

Optionally, the processor 710 may be further configured to receive anoperating instruction of a user on the second preview image, and presentthe second preview image on a target location indicated by the operatinginstruction.

It may be learned from the foregoing embodiments that a terminalacquires an image captured by a camera, and presents, on a screen of theterminal, a first preview image and a second preview image that aregenerated according to the image, where a size of the second previewimage is less than a size of the first preview image. In the embodimentsof the present invention, on an existing basis of displaying a firstpreview image in a full screen manner, a second preview image that issmaller than the first preview image may be presented additionally, sothat a user can adjust photographic composition according to the secondpreview image, thereby enhancing a photography effect and improving userphotography experience.

A person skilled in the art may clearly understand that the technologyin the embodiments of the present invention may be implemented bysoftware in addition to a necessary universal hardware platform. Basedon such an understanding, the technical solutions of the embodiments ofthe present invention essentially or the part contributing to the priorart may be implemented in a form of a software product. The computersoftware product may be stored in a storage medium, such as a read-onlymemory (ROM)/random-access memory (RAM), a magnetic disk, or an opticaldisc, and includes several instructions for instructing a computerdevice (which may be a personal computer, a server, or a network device)to perform the methods described in the embodiments or some parts of theembodiments of the present invention.

The embodiments in this specification are all described in a progressivemanner. The same or similar parts in the embodiments can be referencedmutually. The focus of each embodiment is placed on a difference fromother embodiments. In particular, an apparatus embodiment is describedrelatively simply because it is basically similar to a methodembodiment, and for a related part, reference may be made to a part ofdescription of the method embodiments.

The embodiments of the present invention described above are notintended to limit the protection scope of the present invention. Anymodification, equivalent replacement, and improvement made withoutdeparting from the spirit and principle of the present invention shallfall within the protection scope of the present invention.

What is claimed is:
 1. A preview image presentation method, comprising:acquiring, by a terminal, an image captured by a camera; and presenting,on a screen of the terminal, a first preview image and a second previewimage that are generated according to the image, wherein a size of thesecond preview image is less than a size of the first preview image. 2.The method according to claim 1, wherein presenting, on the screen ofthe terminal, the first preview image and the second preview image thatare generated according to the image comprises: presenting, in a displayarea of the screen, the first preview image generated according to theimage; generating the second preview image according to the firstpreview image by using a downscale algorithm; and presenting the secondpreview image on a preset location in the display area.
 3. The methodaccording to claim 2, wherein presenting the second preview image on thepreset location in the display area comprises presenting the secondpreview image by superimposing the second preview image on a presetlocation of the first preview image.
 4. The method according to claim 2,wherein presenting the second preview image on the preset location inthe display area comprises presenting the second preview image on apreset location that is independent of the first preview image.
 5. Themethod according to claim 2, wherein the preset location comprises: alocation that is located in a same vertical direction as the camera andis spaced from the camera by a distance less than a threshold; or alocation that is in a direction having a preset angle with respect to avertical direction of the camera and is spaced from the camera by adistance less than a threshold.
 6. The method according to claim 3,wherein the preset location comprises: a location that is located in asame vertical direction as the camera and is spaced from the camera by adistance less than a threshold; or a location that is in a directionhaving a preset angle with respect to a vertical direction of the cameraand is spaced from the camera by a distance less than a threshold. 7.The method according to claim 1, wherein the method further comprises:receiving an operating instruction of a user on the second previewimage; and presenting the second preview image on a target locationindicated by the operating instruction.
 8. A preview image presentationapparatus, comprising: an acquiring unit configured to acquire an imagecaptured by a camera; and a presentation unit configured to present, ona screen of a terminal, a first preview image and a second preview imagethat are generated according to the image acquired by the acquiringunit, wherein a size of the second preview image is less than a size ofthe first preview image.
 9. The apparatus according to claim 8, whereinthe presentation unit comprises: a first presentation subunit configuredto present, in a display area of the screen, the first preview imagegenerated according to the image; and a second presentation subunitconfigured to generate the second preview image according to the firstpreview image by using a downscale algorithm, and present the secondpreview image on a preset location in the display area.
 10. Theapparatus according to claim 9, wherein the second presentation subunitis configured to present the second preview image by superimposing thesecond preview image on a preset location of the first preview image.11. The apparatus according to claim 9, wherein the second presentationsubunit is configured to present the second preview image on a presetlocation that is independent of the first preview image.
 12. Theapparatus according to claim 9, wherein the preset location comprises: alocation that is located in a same vertical direction as the camera andis spaced from the camera by a distance less than a threshold; or alocation that is in a direction having a preset angle with respect to avertical direction of the camera and is spaced from the camera by adistance less than a threshold.
 13. The apparatus according to claim 10,wherein the preset location comprises: a location that is located in asame vertical direction as the camera and is spaced from the camera by adistance less than a threshold; or a location that is in a directionhaving a preset angle with respect to a vertical direction of the cameraand is spaced from the camera by a distance less than a threshold. 14.The apparatus according to claim 8, wherein the apparatus furthercomprises a receiving unit configured to receive an operatinginstruction of a user on the second preview image, wherein thepresentation unit is further configured to present the second previewimage on a target location indicated by the operating instructionreceived by the receiving unit.
 15. A terminal, comprising: a processor;and a camera and a screen that are connected to the processor, whereinthe camera is configured to capture an image and transfer the image tothe processor, and wherein the processor is configured to present, onthe screen, a first preview image and a second preview image that aregenerated according to the image, wherein a size of the second previewimage is less than a size of the first preview image.
 16. The terminalaccording to claim 15, wherein the processor is configured to present,in a display area of the screen, the first preview image generatedaccording to the image, generate the second preview image according tothe first preview image by using a downscale algorithm, and present thesecond preview image on a preset location in the display area.
 17. Theterminal according to claim 16, wherein the processor is configured topresent the second preview image by superimposing the second previewimage on a preset location of the first preview image.
 18. The terminalaccording to claim 16, wherein the processor is configured to presentthe second preview image on a preset location that is independent of thefirst preview image.
 19. The terminal according to claim 17, wherein thepreset location comprises: a location that is located in a same verticaldirection as the camera and is spaced from the camera by a distance lessthan a threshold; or a location that is in a direction having a presetangle with respect to a vertical direction of the camera and is spacedfrom the camera by a distance less than a threshold.
 20. The terminalaccording to claim 15, wherein the processor is further configured toreceive an operating instruction of a user on the second preview image,and present the second preview image on a target location indicated bythe operating instruction.